Interleukin-2-dependent augmentation of the anti-TNP antibody production by sodium butyrate in cultured murine splenic B cells.
Previously we found that sodium butyrate (NaBu) markedly enhanced production of the antibody specific for a T-cell-dependent antigen, sheep red blood cells (SRBC) in murine splenocytes (Kishiro, Y., Ueda, K., Fujiwara, M. and Yamamoto, I., Jpn J. Phamacol., 1994 66, 369-376. To gain a better understanding of the target cells for NaBu's action on antibody responses, we have utilized the T-cell-independent antigen, trinitrophenyl-lypopolysaccharide (TNP-LPS) as a stimulant and have examined an effect of NaBu on the anti-TNP antibody production in vitro. NaBu markedly increased the anti-TNP plaque-forming cell (PFC) responses in murine whole splenocytes, but not in murine splenic B cells. Addition of T-cells or the concanavalin A supernatant (CAS) from murine splenocytes to the B cell cultures completely restored the enhancing effect of NaBu. This effect of CAS was totally blocked by an anti-interleukin (IL)-2 antibody and partially by an anti-IL-1 beta or anti-IL-4 antibody. The full enhancing effect of NaBu was also detected when IL-2 was added to the B cell cultures, while IL-2 alone had no stimulatory effect on the control PFC response. IL-1 beta alone significantly stimulated the antibody production and adding NaBu to this IL-1 beta-supplemented culture caused a further increase. Neither IL-4 alone nor NaBu plus IL-4 had any effect on the PFC response. NaBu did not affect the expression of the IL-2 receptor alpha- and beta-chains in B cells stimulated with TNP-LPS. These results suggest that NaBu is an agent that promotes B cell differentiation in vitro in an IL-2-dependent manner.
Yamamoto
I
I
Department of Immunochemistry, Faculty of Pharmaceutical Sciences, Okayama University, Japan.
Adachi
T
T
Kishiro
Y
Y
Fujiwara
M
M
Gohda
E
E
D000818:Animals; D000917:Antibody Formation / Q000187:drug effects*; D001402:B-Lymphocytes / Q000187:drug effects / Q000276:immunology*; D002087:Butyrates / Q000494:pharmacology*; D020148:Butyric Acid; D002478:Cells, Cultured; D004731:Endotoxins / Q000276:immunology*; D005260:Female; D005434:Flow Cytometry; D006633:Histamine Antagonists / Q000494:pharmacology*; D007376:Interleukin-2 / Q000502:physiology*; D008070:Lipopolysaccharides / Q000276:immunology*; D051379:Mice; D008807:Mice, Inbred BALB C; D013154:Spleen / Q000166:cytology* / Q000187:drug effects / Q000276:immunology
D002087:Butyrates; D004731:Endotoxins; D006633:Histamine Antagonists; D007376:Interleukin-2; D008070:Lipopolysaccharides; C048761:trinitrophenyl-lipopolysaccharide; D020148:Butyric Acid; C044101:endotoxin, Escherichia coli